Pr reviewers participants

[Bob343]

@lvermeulen This is adding some additional functionality onto the Pull Request queries, allowing you to pull back reviewers + participants with the query. Two "questionable" pieces that I wasn't sure if it really aligned with the rest of this implementation:

1. In BitbucketCloudClient.cs I defaulted the PR query to now pulling reviewers + participants, should this be an option to the method instead? Either boolean to pull participants + reviewers, or allow passing in fields in general as a string parameter which could be useful for other scenarios where something isn't by default included in the payload.
2. Participant.cs - I added a "User" object as an attribute to the Participant which felt weird, considering Participant is an extension of a User to begin with. But in the response payload from the API, the "user" object is a child of each "participant" in the array. So each participant object doesn't actually contain the identifiable information, the child User object does:
   

Let me know if you want any of this changed. Thanks!

[Bob343]

Hi @lvermeulen ! Would this be able to be incorporated in a release? Thanks!

[Bob343]

Hey @lvermeulen - any chance this would be able to be merged?

[infigo-victor]

Hey @lvermeulen - is there any change that this will be merged any time soon?